Bump github.com/google/go-containerregistry from 0.5.1 to 0.6.0 (#215)

Bumps [github.com/google/go-containerregistry](https://github.com/google/go-containerregistry) from 0.5.1 to 0.6.0.
- [Release notes](https://github.com/google/go-containerregistry/releases)
- [Changelog](https://github.com/google/go-containerregistry/blob/main/.goreleaser.yml)
- [Commits](google/go-containerregistry@v0.5.1...v0.6.0)

---
updated-dependencies:
- dependency-name: github.com/google/go-containerregistry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Forest Eckhardt <feckhardt@pivotal.io>

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/docker/distribution v2.7.1+incompatible
 	github.com/dsnet/compress v0.0.1
 	github.com/gabriel-vasile/mimetype v1.3.1
-	github.com/google/go-containerregistry v0.5.1
+	github.com/google/go-containerregistry v0.6.0
 	github.com/onsi/gomega v1.15.0
 	github.com/pelletier/go-toml v1.9.3
 	github.com/sclevine/spec v1.4.0